Grease-gun cartridge



July 14; 1925.

P. H. PAETZOLD GREASE GUN CARTRIDGE Filed Dec. 19. 1922 HWF Patented July 14, 1925.

UNITED STATES PAL H. PAETZOID, 0F MILWAUKEE, WISCONSIN.

GREASE-GUN CARTRIDGE.

Application led December 19, 1922. Serial No. 607,855.

To all whom t may concer/mi' y Be it known that I, PAUL H. PAE'rzoLD, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful improvements in Grease- Gun Cartridges, of which the following is a specification.

This invention relates to a device for lilling so-called grease guns and the object of. the invention is to provide a container or cartridge, which isv filled with a lubricant and sealed fdr transportation and has such dimensions as to fit a grease gun and to contain an exactl amount of lubricant for the latter,

The advantage of furnishing a cartridge of this character is, that it a-'ords a considerahle saving in grease and is clean inu handling. Furthermore, it is a considerable time saver as the desired quantity of grease to lill the gun is right at hand to put into the same instead of the tedious operation of'y gradually filling it from a large receptacle.

The cartridges are manufactured in different sizes for holding diderent amounts of grease in accordance with the diameter and length of the grease guns for which they are intended.

lt is evident that the device may be applied to uses other than grease guns and fllled with other gelatinous or viscous nia- 'terial such as soap, vaseline, and the like.

ln the accompanying drawings one embodiinent of the invention is illustrated and;

Figure 1 is a longitudinal section of a grease gun loaded with the cartridge forming the subject matter of the present inven-A vwhich is provided with a nozzle 11 screwed on the body 10, and a head 12 similarly screwed on the h-ody 10 at the opposite end o thereof. This head 12 has a central opening forming a hearing for the shank 1li of the plunger 13, which shank .has a terminal handle 15. The diameter of the plunger 1T; is the same as the chamber diameter of the nozzle 11 or the head 12, hut the internal. diameter to the sleeve in body 10 is slightly greater, so that room is provided for the walls of the cartridge within the sleeve.

The cartridge 16 consists of a hollow cylinder or shell 17 preferably madefof cardboard or libre suitably impregnated or treated, so as to make it oil-proof. The thickness of the walls of the shell 17 is equal to the difference vof the inside diameters 0f the sleeve 10 and the head 12, so that when the cartridge is inserted in the gun, the plunger will fit snugly nin the shell 17.

Each end of the shell is provided with reinforcement consisting of a thin annular metallic hand 18 clamped 0r threaded on the outside of the shell, as seen in Figure 2. Similarly internal reinforcements 19 are provided. at each end ofthe cartridge fitting tightly therein.

, When the reinforcements have smooth surl threaded engagements with the ends of the n shell 17, as seen in Figure 3 of the drawing,

a somewhat dierent cap 25 is provided..v

This cap has an annular rim 26, which is threaded to lit the outer reinforcement 23 and the caps 25 are accordingly screwed on the ends of the cartridges 4after they have been lled. e

'The over all length of the shell 17 is slightly greater, than the length of the sleeve 10 in the grease un, so that when the grease gun is assem led together with a cartridge, the nozzle and' head of the grease gun abut against they ends vof the shell 17, so as to make tight joints at these places. ln order to insure still greater tightness at the joints a small washer 27 of leather or rubber is preferably inserted in the nozzle and head of the grease gun, .as seen in Figure 1, so that when the cartridge is inserted its ends will rest on these washers 'and prevent any leakage of grease through the joints.

The cartridges are hlled with the exact quantity of grease required for the grease gun and sealed by the caps 20 or 25, de-

pending upon which construction of the ends for the cartridges has heen used, and the cartridges are then ready for shipment from the factory to the machine shop where they are to be used.

Before inserting a cartridge in the grease gun both end caps have to be removed. That is to say, after either the nozzle 11 orthe head 12 has been removed from the grease gun, the best Way probably being to leave the nozzle 11 in position and unscrew the head 12 together With a plunger 13; one of the end caps or 25 is taken o' the cartridge and the latter then pushed into the sleeve 10 of the grease gun, With the open end towards the nozzle. When the cartridge is entered far enough in the sleeve, the other cap is then removed whereupon the head 12 is again replaced on the open end of the grease -gun and screwed down tightly, With the ends of the cartridge leaving asmall space between the ends of the sleeve 10, and thehead 12, and the nozzle 11 respectively. It is evident that the plunger 13 during this assembling of the parts should have been retracted into the chamber of the head 12 vand the gun is novv ready for use and the grease can be squirted into the bearings Where needed, by pushing the plunger forward in the rgrease gun. As soon as the plunger has made a full stroke the gun is ready for another charge, When it is opened as already described and the second cartridge inserted in the same manner.

Having thus described the invention what is claimed as newA is:

A cartridge for grease guns comprising an open-ended 'shell of fibrous material, relatively narrow reinforcing rings embedded respectively in the internal and external circumferential surfaces of the shell at the ends thereof and flush with said surfaces, the outer ends of the rings being disposed Hush Withthe corresponding ends of PAUL H. PAETZOLD. 

